Unlike shapes, pictures in PowerPoint don't have a transparency setting. As a workaround you can fill a shape with a picture and then adjust the fill transparency. Here's the step-by-step guide for PowerPoint 2010 and later:

Setting up a PowerPoint slideshow to loop continuously is easy:

By default, PowerPoint advances to the next slide only when a mouse click occurs. If you want your slideshow to advance automatically, follow the steps below:

When asking for assistance with a PowerPoint problem, it’s helpful to know what version of Microsoft PowerPoint you are using. In this post I will show you how to easily tell the versions apart and find the exact version numbers. Please note that only PowerPoint for Windows is covered.

PowerPoint 2003 is the last version to use a traditional menu bar and toolbar (instead of a ribbon). Follow the steps below to find your copy’s version number:

PowerPoint 2007 introduces the Ribbon, a panel at the top of the window that organizes commands into tabs. You can tell PowerPoint 2007 apart from newer versions by the Office Button—a round button with the Office logo at the top left corner of the Ribbon. To to find the exact version number in PowerPoint 2007, follow these steps:

In PowerPoint 2010, Microsoft replaced the round Office Button with the File tab. You can find the version number as follows:

Compared to PowerPoint 2010, PowerPoint 2013’s user interface is much flatter, matching the design of Windows 8. To look up the exact version number, follow these steps:

PowerPoint 2016 looks quite similar to PowerPoint 2013, but Ribbon tab names no longer display in all caps. The steps to find the version number are exactly the same as in PowerPoint 2013:
PowerPoint (April 1987): 1.0
PowerPoint (May 1988): 2.0
PowerPoint 3 (May 1992): 3.0
PowerPoint 4 (February 1994): 4.0
PowerPoint 95 (July 1995): 7.0
PowerPoint 97 (January 1997): 8.0
PowerPoint 2000 (June 1999): 9.0
PowerPoint XP (May 2001): 10.0
PowerPoint 2003 (October 2003): 11.0
PowerPoint 2007 (January 2007): 12.0
PowerPoint 2010 (June 2010): 14.0
PowerPoint 2013 (January 2013): 15.0
PowerPoint 2016 (September 2015): 16.0
We have just released version 1.3.1 of ShapeChef, which you can download and install from this link. Updating is free for all current users.
Version 1.3.1 mainly solves an issue with ShapeChef not being usable with the latest Office 365 Insider preview version of PowerPoint 2016 on Windows 10. If you don’t see any content under ShapeChef Shapes (as in the screenshot below), please install this update to solve the issue.

Here’s the full list of changes:
Although PowerPoint doesn’t have dedicated functionality for creating countdown timers, it’s possible to build a timer using animation and slide transition effects. Instead of boring you with a step-by-step tutorial, I’ve created an attractive template with a digital clock countdown that you can easily adjust to your needs.
The countdown in the template lasts five minutes, but you can delete slides to shorten it if needed. Download the template file here.
Here’s another insightful and entertaining presentation that I found on SlideShare. It provides examples of phrases that should be avoided because they can ruin a presentation in seconds: